Buttonhole-stitching machine.



No. 865,324. I PATENTED SEPT. 3, 1907.

E. B. ALLEN.

BUTTONHOLB STITUHING MAOHIM APPLICATION nun 00120. 1906.

- 2 SHEETS-SHEET, 1.

B. B. ALLEN. BUTTONHOLB STITGHING MACHINE.

APPLICATION 31mm 00130. 1906. I

k 2 SHEETS-SHEET 2.

No. 365,324. PKTENTED SEPT. a, 1907.-

. tached to the head of the machine, and which plate i the sleeve 170 rigid therewith, to be adjusted slightly so as to move said sleeve toward said pinion when wear and-groove connection, as at 18], with a support or above; and when the said cord guide is to be threaded it is displaced from its concentric working position by being swung outward, as above stated.

The racks 81 and 82, which operate the pinions 28 and 30 which impart periodical turning-movements to the needles and loopers, are preferably adjustably connected with the sliding rods 79 and 80 by which said racks are operated, and said racks are also preferably so mounted as to be slightly adjustable laterally relative to said pinions for the purpose of taking up wear. To this End the upper rack 81 is mounted to slide in a sleeve 170 rigid with a plate or' arm.171 ator arm 171 is provided with holes or slots 172 through which the shanks of the attaching screws 173 pass with suiiicient ioosencss to permit the said plate or arm, and

is to be taken up; the recess in the machinc'head, which receives said sleeve, being suiliciently large to permit oi such adjustment oi said sleeve, The rear end of the rod 174, on which the said rack 81 is l'ormed, is notched on both sides to form a flattened portion embraced by a fork 175 rigid with a collar l7ii adjustably attached to the sliding rod 79, so that the position 1 of said collar on said rod may be varied to secure the proper timing or adjustment oi the pinion 28 and of the needle-bar guide 27 to which said pinion is attached. Also the rod 'l77 on which the lower rack 82 is formed is notched on both sides at its rear end, similar to the rod W4, and the llattened portion of the said rod 177 is embraced by a fork l78 rigid with a collar 179 adjustably attached to the sliding rod 80, so that the timingor adjustment of the pinion 30, from which the. turning movements of the looping devices are derived, maybe readily effected by varying the position of the said collar 179 on said rod 80. The rack-rod l77 slidcs in a bearing plate or guide 180 having an adjustable tongueblock 182 rigid with the machine base, said plate having a slot or hole 183 through which the shank of its attaching screw loosely passes to permit the position of said plate to be varied slightly for the purpose of taking up wear between said rack 82 and said pinion 30.

it will of course be understood that the present invention. is not limited to thedctails heroin shown and described, as such details may be varied widely without departing irom the spirit of the invention.

Having thus described my, invention I claim and desire to secure by Letters Patent:

1. in a bulton hole stiichlngannchlnc, the combination with upper and lower stitch-forming devices rotativoly mountcll on ihe machine frame, of pinlons for periodically turning said siiich-iorming devices, sliding racks for cugaging said pinions, sliding rods for opcraling said racks, a vertical bar to which said sliding rods are attached, a stud ol' pin on said vcrilcul rod midway between said sliding rods, or approximately so, to impart equal and parallel movcmcnls lo said rods without tendency to bind, and :1 grooved operating cam entered by said stud or pin and by which positive rolnllug movements in both direciious will bc imparted to said stitching devices.

L. in a builon-hoic .-.iiiching-ln'achinc, the combination with upper and lowcr stilt-informing devices roialivcly lnounicd on the machine i'ranlc. oi pinions for periodically turning said still-informing devices. sliding racks for open-- :iilng said pinions. sliding rods with which said racks are adjnsiably connected, and means for operating said sliding rods.

with upper and lower stitch-forming devices rotatlvely mounted on the machine frame, of pinions lor periodically turning said stitch-forming devices, sliding'racks for operating said pinions, sliding rods with which said racks are connected, adjustable guides in which said racks are mounted, and means for operating said sliding rods.

4. In a button-hole stitching machine, the combination with work-hoidim, and upper and lower stitch-forming devices, of a cordguide movably mounted beneath the work-support of the machine so that it may be displaced from working position for convenience in threading, said cord-guide having a guiding portion which is approximately concentric with said lower stitclrforming devices when said cord guide is in working position.

5. In a lllllifilldlflic stitching machine, the combination with vi'ork-holdin; and upper and lower stitch-forming devices, of a cord-guide movably mounted beneath the \vork-sumiort of the machine so that it may be displaced from working position for convenience in threading, and means for holding said cord-guide in working position, said cord-guide haying a guiding portion which is approximately concentric with said lower stitch-forming devices when said cord guide is in workingposition.

1;. in a button-hole stitching machine, the combination with work-holdin and uppcr and lower stitch-forming devices, of a cord-guide pivol'ally mounted beneath the \vorlesupport so that it may be swung outward horizonially for convenience in threading, said cord-guide having a guiding portion which is approximately concentric with said lower stitchforming dcviccs when said cordguide is in working position.

7. in a button-hole stitching machine, the combination with \vorkdiolding and upper and lower stitch-forming devices, of a cord-guide pivotally mounted beneath the worlesupport so that it may be swung outward horizontally for convenience in threading, and a spring for holding" said cord-guide in working position, said cordguide having a guiding portion which is approximately concentric with said stitch-forming devices when said cord-guide is in working position.

H. in a button-hole stitching machine, the combination with stitch-forming and work-holding devices, of a pivotally mounted block lib), the cord-guide 11H consisting of u horizontally swinging arm extending beneath the worksupport and having a cord-guiding eye at its inner end, said arm being mounted on said block, and a spring pressing against said block and serving to hold said cord-guide in working position. A

ii. in n button-hole stitelling-machine, the combination with upper and lower stitch-form ng devices rotaiively mounted on the machine frame, of pinions for periodically turning said stitch-forming devices, sliding, racksfor operating said pinions, sliding rods with which said racks are :nljusi'ubly connected, adjustable guides in which said racks are mounted, and means for opcraiing said sliding rods.

iii. In a button-hole stitchlug-machine, the combination with upper and lower stitch-forming devices rotatlvcly mounted on the machine frame, of pinions for periodically gaging said pinious, sliding rods for operating said racks .aud to which rods said racks are ndjustably attached, a

l lliWAltl) ii. ALLEN. Witnesses i". \Y. (is'rnoil, ll. ll. 'lullmcs,

ii. In a button-hole siltching-nmchine, the combination 

